Wellhead gas treatment and co-generation method and system

Details Wellhead gas treatment and co-generation method and system Wellhead gas treatment and co-generation method and system

1985-01-07

1986-03-18

Ostrager, Allen M.

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

Having fluid motor motive fluid treating, controlling or...

123 3, 60648, F01K 2306

Patent

active

045760055

ABSTRACT:
A thermodynamic method and system is described and claimed for treating wellhead gas to recover valuable liquefiable hydrocarbon components from such gas and for utilizing the resulting dry gas as a fuel for an internal combustion engine driving a generator for the co-generation of electric power. In accordance with the invention, raw wellhead gas as a by-product of gas and oil field operations is compressed and cooled to condense the ethane and higher molecular weight hydrocarbon components of the gas and the condensed components are removed as liquefied hydrocarbon product. The remaining non-condensible methane and lower molecular weight components of the gas are used as fuel in an internal combustion engine driving a generator. The waste heat of the internal combustion engine, embodied in the engine's coolant fluid and exhaust gases of combustion, is utilized to indirectly heat the circulating fluid medium in a closed circuit organic Rankine Cycle engine to produce work energy which is utilized in part to compress the raw wellhead gas and in part to cool such compressed gas and thereby effect the separation of the liquefiable components of the gas from the non-condensible components of the gas.

REFERENCES:
patent: 4182127 (1980-01-01), Johnson

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